28049408 has 38 divisors (see below), whose sum is σ = 56622996. Its totient is φ = 13893632.

The previous prime is 28049407. The next prime is 28049423. The reversal of 28049408 is 80494082.

It is not an unprimeable number, because it can be changed into a prime (28049407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262091 + ... + 262197.

Almost surely, 2^28049408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28049408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28311498).

28049408 is an abundant number, since it is smaller than the sum of its proper divisors (28573588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28049408 is an frugal number, since it uses more digits than its factorization.

28049408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 28049408 is about 5296.1691815878. The cubic root of 28049408 is about 303.8374015055.

The spelling of 28049408 in words is "twenty-eight million, forty-nine thousand, four hundred eight".